@article{GT_2013_17_4_a12,
     author = {Georgieva, Penka},
     title = {The orientability problem in open {Gromov{\textendash}Witten} theory},
     journal = {Geometry & topology},
     pages = {2485--2512},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {2013},
     doi = {10.2140/gt.2013.17.2485},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2013.17.2485/}
}